214 BYZANTINE CHURCHES CHAP. his vermilion tent, marshalled his best troops, and watched the operations of the enemy. And thence he fled when he saw the walls on the shore below him carried by storm, and Flemish knights mounted on horses, which had been landed from the hostile fleet> advancing to assault his position. So hurried was his flight that he left his tent standing, and under its shelter Count Baldwin of Flanders and Hainault slept away the fatigue of that day's victory.1 During the Latin occupation the church passed into the hands of the Venetians3 and was robbed of many of its relics for the benefit of churches in the West.2 Upon the Turkish conquest it served for some time as an imaret or refectory for the students and teachers of the medre$s$* then in course of construction beside the great mosque of Sultan Mehemed. Hence its Turkish name* After serving that purpose it was converted into a mosque later in the reign of the conqueror. Architectural Features In plan the church belongs to the c four column * type, and has two narthexes. The dome, placed on a drum, circular within and twelve-sided without, is carried on four piers which the Turks have reduced to an irregular octagonal form. It is divided Into twelve bays by square ribs, and is lighted by twelve semicircular - headed windows. The cornice-string is adorned with a running leaf spray of a pleasing and uncommon design. The arms of the cross have barrel vaults, while the chambers at its angles are covered with cross-groined vaults. The apsidal chambers are small, with shallow niches on the north, south, and west, and a somewhat deeper niche on the east where the apse stands. These niches are carried up through a vaulting string-course, carved with a repeating leaf ornament, and combine with the groined vault above them to produce a charming canopy. The southern transept gable, though s Villehardoum, La Conquite de C,P, pp. 141-44 ; Chronlques grfco-romaines, PP« 9$» 97- 2 Riant, Exuviae sacrae, p. 178. d Paspates, p. 314.